IBM eServer zSeries 900 Technical Guide

150 IBM eServer zSeries 900 Technical Guide

IC-3 channel paths can be used to connect a Coupling Facility LPAR (using definition type

ICP) to an ESA/390 LPAR (using definition type ICP) on the same CPC. The z/Architecture or

ESA/390 architecture LPARs using ICP can also use CFP, CBP, and/or CBS-defined channels

at the same time to connect to Coupling Facility LPARs on another server.

On earlier generation servers, ISC or ICB channels could be used to connect a Coupling

Facility LPAR to an ESA/390 LPAR on the same server. This was referred to as

Self Coupled.

This is still possible on the z900 server, but is not recommended. We recommend using IC-3

Coupling channels when connecting a Coupling Facility LPAR to other operating system

LPARs on the same z900 server.

3.9.1 Connectivity

Following are Coupling channel connectivity options in the Parallel Sysplex environment.

z900 Coupling channel features

z900 supports the following Coupling channel features:

򐂰 Inter-System Channel-3, ISC-3 (Peer and Compatibility modes: feature codes 0217, 0218,

and 0219)

򐂰 Integrated Cluster Bus-3, ICB-3 (Peer mode: feature code 0993)

򐂰 Integrated Cluster Bus, ICB (Compatibility mode: feature code 0992)

򐂰 Internal Channel-3, IC-3 (Peer mode: no feature code, Licensed Internal Code (LIC)

function defined via HCD/IOCP)

ISC-3 Coupling channel

The z900 ISC-3 feature is made up of the following feature codes:

򐂰 ISC-3 Mother Card (feature code 0217)

򐂰 ISC-3 Daughter Card (feature code 0218)

򐂰 ISC-3 Port (feature code 0219)

Figure 3-33 on page 151 shows connectivity options for ISC-3 channels.

Chapter 3. Connectivity 151

Figure 3-33 z900 ISC-3 connectivity options

The z900 ISC-3 mother card occupies one slot in the z900 zSeries I/O cage. The ISC-3

mother card supports up to two ISC-3 daughter cards. Each ISC-3 daughter card has two

independent ports with one CHPID associated with each active port. The ISC-3 ports are

activated via Licensed Internal Code Configuration Control.

The ISC-3 mother and daughter card feature codes cannot be ordered. Instead, the quantity

of ISC-3 Port features ordered determines the appropriate number of ISC-3 mother and

daughter cards included in the configuration.

Each active ISC-3 port supports connection to a 2 Gbps (ISC-3 Peer mode) or 1Gbps (ISC-3

Compatibility mode) Coupling link via 9 micron single mode fiber optic cable terminated with

an LC-Duplex connector.

ISC features on G5/G6 and earlier servers have Fiber Optic Sub Assemblies (FOSA) that

support SC-Duplex cable connectors. These existing single mode HiPerlink cables can be

reused by attaching a single mode fiber LC-Duplex to SC-Duplex conversion cable. This is a

2 m cable that is connected between the z900 server ISC-3 port and the existing HiPerlink

cable from the G5/G6 server.

Existing SC-Duplex 50 micron multimode fiber cable infrastructure may be reused with the

z900 ISC-3 port features in Compatibility mode (1 Gbps) only. The use of these multimode

cable types requires a mode conditioner patch (MCP) cable to be used at each end of the

fiber link. Use of the single-mode to multimode MCP cables reduces the supported optical

distance of the link to 550 meters.

z900

LP1 LP2 LP3

CHPID type CFP CFP CFS CFS

Data rate 2Gb 2Gb 1Gb 1Gb

Cabling req***

Sm

fiber

Sm

fiber

Sm

fiberr

Sm

fiber

I/O card used YES YES YES YES

feature code

0218/

0219

0218/

0219

0218/

0219

0218/

0219

feature name ISC-3 ISC-3 ISC-3 ISC-3

STI connection STI-M STI-M STI-M STI-M

CF01

STI connection STI-M STI-M

Feature name ISC-3 ISC-3

Feature code

0218/

0219

0218/

0219

I/O card used YES YES

Cabling req

Sm

fiber

Sm

fiber

Data rate 2Gb 2Gb

CHPID definition CFP CFP

CF02

STI connection ** **

Feature name ISC ISC

Feature code 008 008

I/O card used YES YES

Cabling req

Sm

fiber

Sm

fiber

Data rate 1Gb 1Gb

CHPID definition CFR CFR

Sm Fiber max distance *10 km

LC connector ends at 2064

z900

SC to LC duplex 2 m cable adapter

(single-mode) P/N 05N4808

CHPIDs defined as

CFP runs in

peer mode

CFS/CFR runs in

compatibility mode

* Max distance with RPQ

20 km

(requires new H/W)

Reuse of existing HiPerlink

single-mode cabling

100

** STI connection thru

FIBB and ISC mother

card on G5/G6

***Multimode cabling may

be rused; requires MCP

cables and distance

restricted to 550 m.

9672

R06

ISC-3 operates in peer or

compatibility mode